Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	$ 5	$ 19	$ 14	$ 50
Postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	11	9	33	28
DTE Electric | Pension plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	1	12	4	28
DTE Electric | Postretirement benefit plans
Defined Benefit Plan Disclosure [Line Items]
Pension credit	$ 6	$ 6	$ 18	$ 18